Schweitzer Engineering SEL-387-0, Instruction Manual

Page: 250 / 556

SET.2 of 36 SEL-387-0, -5, -6 Relay Settings Sheets Example
Group Settings (SET Command)
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Date________________
Winding 1 CT Ratio (1–50000)
(first value applies to a 5 A relay;
second value applies to a 1A relay)
CTR1 = 120 ; 600
Winding 2 CT Ratio (1–50000)
(first value applies to a 5 A relay;
second value applies to a 1A relay)
CTR2 = 240 ; 1200
Winding 3 CT Ratio (1–50000)
(first value applies to a 5 A relay;
second value applies to a 1A relay)
CTR3 = 400 ; 2000
Winding 4 CT Ratio (1–50000)
(first value applies to a 5 A relay;
second value applies to a 1A relay)
CTR4 = 400 ; 2000
Maximum Power Transformer Capacity (OFF, 0.2–5000 MVA) MVA = 100
Define Internal CT Connection Compensation (Y, N) ICOM = Y
Winding 1 CT Conn. Compensation (0, 1, …, 12) W1CTC = 11
Winding 2 CT Conn. Compensation (0, 1, …, 12) W2CTC = 11
Winding 3 CT Conn. Compensation (0, 1, …, 12) W3CTC = 0
Winding 4 CT Conn. Compensation (0, 1, …, 12) W4CTC = 0
Winding 1 Line-to-Line Voltage (1–1000 kV) VWDG1 = 230
Winding 2 Line-to-Line Voltage (1–1000 kV) VWDG2 = 138
Winding 3 Line-to-Line Voltage (1–1000 kV) VWDG3 = 13.8
Winding 4 Line-to-Line Voltage (1–1000 kV) VWDG4 = 13.8
Differential Elements
NOTE:
TAP1–TAP4 are auto-set by relay if MVA setting is not OFF.
Winding 1 Current Tap
(0.50–155.00 A secondary) (5 A) TAP1 = 2.09
(0.10–31.00 A secondary) (1 A)
= 0.42
Winding 2 Current Tap
(0.50–155.00 A secondary) (5 A) TAP2 = 1.74
(0.10–31.00 A secondary) (1 A) = 0.35
Winding 3 Current Tap
(0.50–155.00 A secondary) (5 A) TAP3 = 10.46
(0.10–31.00 A secondary) (1 A) = 2.09
Winding 4 Current Tap
(0.50–155.00 A secondary) (5 A) TAP4 = 10.46
(0.10–31.00 A secondary) (1 A)
= 2.09
Restrained Element Operating Current PU
((0.10–1.00) multiple of tap)
O87P = 0.30
Restraint Slope 1 Percentage (5–100%) SLP1 = 25
Restraint Slope 2 Percentage (OFF, 25–200%) SLP2 = 50